Kazfam,
I think you and Fred might be right as a couple of days ago I found a couple of clusters of what looks like either asassin bug nymphs or leaf footed stink bug nymphs on the underside of a couple of corn plant leaves:
http://www.dpughphoto.com/images/lea...ll%2053107.JPG
Saw some adults last year but haven't noticed any yet this year.
Thanks for the input!
Anne